82086644 has 6 divisors (see below), whose sum is σ = 143651634. Its totient is φ = 41043320.

The previous prime is 82086623. The next prime is 82086647. The reversal of 82086644 is 44668028.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 17123044 = 8060^2 + 4138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 82086598 and 82086607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82086647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10260827 + ... + 10260834.

It is an arithmetic number, because the mean of its divisors is an integer number (23941939).

Almost surely, 2^82086644 is an apocalyptic number.

It is an amenable number.

82086644 is a deficient number, since it is larger than the sum of its proper divisors (61564990).

82086644 is a wasteful number, since it uses less digits than its factorization.

82086644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20521665 (or 20521663 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 82086644 is about 9060.1679896126. The cubic root of 82086644 is about 434.6011122968.

The spelling of 82086644 in words is "eighty-two million, eighty-six thousand, six hundred forty-four".